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Method for producing full eucalyptus plywood by using anticorrosion composite urea-formaldehyde resin

A technology for compounding urea-formaldehyde resin and plywood, which is applied in the jointing of wooden veneers, other plywood/plywood utensils, chemical instruments and methods, and can solve the problems of perishability, poor insect resistance, and poor corrosion resistance of eucalyptus plywood. High-level problems, to achieve the effect of white color, good film-forming property, and reduce the content of free formaldehyde

Active Publication Date: 2018-09-04
广西横县正林木业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there is no literature report on the production of eucalyptus plywood with anticorrosive compound urea-formaldehyde resin as glue
The whole eucalyptus plywood is a wooden material, which is easily attacked by bacteria, insects, marine borers and other organisms, and is easy to rot. subject to some restrictions

Method used

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  • Method for producing full eucalyptus plywood by using anticorrosion composite urea-formaldehyde resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Adopt anticorrosion composite urea-formaldehyde resin to produce the method for full eucalyptus plywood, comprise the steps:

[0065] (1) Rotary slices of wood: use a rotary cutter to cut the eucalyptus into 1.5 mm thick slices to obtain eucalyptus veneers, and pick out the unqualified boards with insect eyes, decay and excessive defects;

[0066] (2) Veneer drying: Dry the eucalyptus veneer with a hot air stove, and control the moisture content of the veneer to be less than or equal to 10%;

[0067] (3) Glue coating: glue the eucalyptus veneer with a glue machine, and arrange 9 layers of glued eucalyptus veneers in a criss-cross pattern according to the wood texture structure, and glue them together to obtain a eucalyptus slab; The glue is anti-corrosion compound urea-formaldehyde resin, and the amount of glue on one side is 200g / m 2 ;

[0068] (4) Three times of cold pressing: the eucalyptus slab is cold pressed three times at a unit pressure of 0.8 MPa and at room ...

Embodiment 2

[0089] Adopt anticorrosion composite urea-formaldehyde resin to produce the method for full eucalyptus plywood, comprise the steps:

[0090] (1) Rotary slices of wood: use a rotary cutter to cut the eucalyptus into 1.5 mm thick slices to obtain eucalyptus veneers, and pick out the unqualified boards with insect eyes, decay and excessive defects;

[0091] (2) Veneer drying: Dry the eucalyptus veneer with a hot air stove, and control the moisture content of the veneer to be less than or equal to 10%;

[0092] (3) Gluing: Glue the eucalyptus veneers with a gluing machine, and arrange 11 layers of glued eucalyptus veneers in criss-cross layers according to the wood texture structure, and glue them together to obtain eucalyptus slabs; The glue is anti-corrosion compound urea-formaldehyde resin, and the amount of glue on one side is 220g / m 2 ;

[0093] (4) Three times of cold pressing: the eucalyptus slab is cold pressed three times at a unit pressure of 0.85 MPa and at room tempe...

Embodiment 3

[0114] Adopt anticorrosion composite urea-formaldehyde resin to produce the method for full eucalyptus plywood, comprise the steps:

[0115] (1) Rotary slices of wood: use a rotary cutter to cut the eucalyptus into 1.5 mm thick slices to obtain eucalyptus veneers, and pick out the unqualified boards with insect eyes, decay and excessive defects;

[0116] (2) Veneer drying: Dry the eucalyptus veneer with a hot air stove, and control the moisture content of the veneer to be less than or equal to 10%;

[0117] (3) Gluing: Glue the eucalyptus veneers with a gluing machine and arrange 13 layers of glued eucalyptus veneers criss-cross and layered according to the wood texture structure, and glue them together to get eucalyptus slabs; The glue is anti-corrosion compound urea-formaldehyde resin, and the amount of glue on one side is 230g / m 2 ;

[0118] (4) Three times of cold pressing: the eucalyptus slab is cold pressed three times at a unit pressure of 0.9 MPa and at room temperat...

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Abstract

The invention discloses a method for producing total-eucalyptus plywood by adopting anticorrosive composite urea resin. The method comprises the following steps: rotatably cutting wood boards; drying each board; gluing; performing cold pressing for three times; stewing and conditioning; performing hot pressing for three times; cooling and conditioning; determining the thickness of a board blank and sanding the board blank. The key points of the production method disclosed by the invention are that melamine modified urea resin is adopted as a main material of an adhesive and is added with oxidized starch to form a viscous compound, polyvinyl alcohol is taken as a toughening agent, hydrogenated rosin is taken as an antioxidant, polyisocyanate is taken as a curing agent, isobutyl triethoxy silane is taken as a bridging agent, phenolated lignin is taken as a formaldehyde catcher and a preservative is also added to prepare the anticorrosive composite urea resin. The total-eucalyptus plywood produced by adopting the anticorrosive composite urea resin has the advantages of low formaldehyde residual volume and good corrosion resistance, is relatively good in resistance to wood-destroying fungi, mould and white ants, and is prolonged in service life.

Description

technical field [0001] The invention belongs to the field of wood-based panel manufacturing, in particular to a method for producing whole eucalyptus plywood by adopting an anti-corrosion compound urea-formaldehyde resin. Background technique [0002] Plywood is an important type of wood-based panel. The plywood currently on the market is a three-layer or multi-layer board-like material that is cut into veneers by wood segments or sliced ​​into thin wood by wood squares, and then glued with adhesives. It is usually made of odd-numbered veneers, and the fiber directions of adjacent veneers are glued perpendicular to each other; plywood is widely used in architectural decoration, furniture manufacturing, wooden door manufacturing, Floor manufacturing, marine and vehicle interior finishing. [0003] The production of plywood is mostly made of fast-growing eucalyptus wood sheets pressed together by adhesives. Eucalyptus wood has a dense structure and hard material, and the lam...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27D1/04B27D1/08B27D5/00B32B37/06B32B37/10C09J161/32C09J103/10C09J11/08C09J11/06C09J11/04
CPCB27D1/04B27D1/08B27D5/00B32B37/06B32B37/10C08L2205/035C09J11/04C09J11/06C09J11/08C09J161/32C08L3/10C08L29/04C08L93/04C08L97/005C08K13/02C08K3/04C08K2003/387C08K5/098
Inventor 陈姗姗
Owner 广西横县正林木业有限公司
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